Edmund Rice, an early immigrant to Massachusetts Bay Colony and a founder of Sudbury and Marlborough, belonged to haplogroup I1.

Alexander Hamilton, through genealogy and the testing of his descendants, has been placed within Y-DNA haplogroup I-M253.

Birger Magnusson - Birger Jarl, the founder of Stockholm the modern capital of Sweden, according to Andreas Carlsson at The National Board of Forensic Medicine of Sweden, belonged to haplogroup I1. Birger Magnusson was the ancestor of a line of kings of both Sweden and Norway, starting with his son Valdemar Birgersson.

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